3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class Foo { public $a; function __construct() { $this->a = $this; } } $foo = new Foo(); var_dump($foo, $foo->a, $foo->a->a, $foo->a->a->a);
Output for 5.2.14 - 5.2.17, 5.3.3 - 7.1.0
object(Foo)#1 (1) { ["a"]=> *RECURSION* } object(Foo)#1 (1) { ["a"]=> *RECURSION* } object(Foo)#1 (1) { ["a"]=> *RECURSION* } object(Foo)#1 (1) { ["a"]=> *RECURSION* }
Output for 5.0.0 - 5.2.13, 5.3.0 - 5.3.2
object(Foo)#1 (1) { ["a"]=> object(Foo)#1 (1) { ["a"]=> *RECURSION* } } object(Foo)#1 (1) { ["a"]=> object(Foo)#1 (1) { ["a"]=> *RECURSION* } } object(Foo)#1 (1) { ["a"]=> object(Foo)#1 (1) { ["a"]=> *RECURSION* } } object(Foo)#1 (1) { ["a"]=> object(Foo)#1 (1) { ["a"]=> *RECURSION* } }
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/LV61N on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/LV61N on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/LV61N on line 5
Process exited with code 255.